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VSC8221 Datasheet(PDF) 42 Page - Microsemi Corporation |
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VSC8221 Datasheet(HTML) 42 Page - Microsemi Corporation |
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42 / 138 page  VSC8221 Data Sheet VMDS-10106 Revision 4.1 December 2006 42 of 43 43 Link10/Activity1 1 No link in 10BASE-T 0 Valid 10BASE-T link Pulse-stretch/Blink2 (optional) Valid 10BASE-T link and activity present Link10/100/Activi- ty1 1 No link in 10BASE-T or 100BASE-Tx 0 Valid 10BASE-T link or valid 100BASE-Tx link Pulse-stretch/Blink2 (optional) Valid 10BASE-T link or valid 100BASE-Tx link and activity present Link100/1000/ Activity1 1 No link in 100BASE-Tx or 1000BASE-T 0 Valid 100BASE-Tx link or valid 1000BASE-T link Pulse-stretch/Blink2 (optional) Valid 100BASE-Tx link or valid 1000BASE-T link and activity present Link/Act3 1 No link in any speed 0 Valid link in any speed Pulse-stretch/Blink2 Valid link in any speed and activity present Collision 1 No collisions detected Pulse-stretch/blink2 Collisions detected Activity 1 No activity Pulse-stretch/blink2 Activity present Fiber 1 No valid 1000BASE-X link established 0 Fiber media detected on SerDes interface and valid 1000BASE-X link established Fault 1 No iEEE Clause 37/28 auto-negotiation fault 0 iEEE Clause 37/28 auto-negotiation fault Serial ** See serial interface specification Duplex/Collision4 1 Link established in half-duplex mode, or no link established 0 Link established in full-duplex mode Pulse-stretch/Blink2 (optional) Link established in half duplex mode and collisions present Rx 1 No activity on Rx side Pulse-stretch/blink2 Activity present on Rx side Tx 1 No activity on Tx side Pulse-stretch/blink2 Activity present on Tx side 1 The “Linkxxx” functions are combined with “Activity” by default. To use the LED as a dedicated “Linkxxx,” LED Mii register bit 27.1 must be set. 2 Function can either blink or be pulse-stretched when active. See Table 22 below. 3 The “Link” functions are combined with “Activity” by default. To use the LED as a dedicated “Link,” LED Mii Register bit 27.2 must be set. 4 The “Duplex” function is combined with “Collision” by default. To use the LED as a dedicated “Duplex,” LED Mii register bit 27.0 must be set. Table 21. Parallel LED Functions (continued) Function Name State Description |
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